Tens of millions of people are in the path of a major winter storm. Federal cuts threaten efforts to understand the causes of such weather.

A winter storm descending on the US is expected to deliver heavy snow and ice to more than 150 million people across roughly ...

Strong winds, frigid temperatures, and snowfall moved across several states during the course of the last few days, and for ...

The west half of the country, including the Midwest, will start to warm up. But that won't be the case for the East Coast.

Rising Arctic temperatures and melting sea ice could be causing cold air to flow into the Northern Hemisphere. But not all ...

To understand what Americans are experiencing with this winter blast, we need to look more than 20 miles above the surface of ...

Much of the nation east of the Rocky Mountains is hunkered down for what could be the worst winter storm of the season.

Deep penetration of cold temperatures and a coastal storm will bring bomb cyclone and polar vortex into your newsfeeds.

The North Pole is surrounded by a massive circular upper-air weather phenomenon in the Arctic called the polar vortex. It is ...

A severe winter storm that brought freezing rain, sleet and snow to a large part of the U.S. was intensified by the polar ...

A collapse in the polar vortex is letting Artic air come here. What that means, and why it happens.